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Calcium sulfate (or calcium sulphate) is the inorganic compound with the formula CaSO 4 and related hydrates. In the form of γ- anhydrite (the anhydrous form), it is used as a desiccant . One particular hydrate is better known as plaster of Paris , and another occurs naturally as the mineral gypsum .
CaS: calcium sulfide: 20548–54–3 CaSO 4: calcium sulfate: 7778–18–9 CaSe: calcium selenide: 1305–84–6 CaSiO 3: calcium metasilicate: 1344–95–2 CaSi 2: calcium silicide: 12013–56–8 CaTe: calcium telluride: 12013–57–9 CaTiO 3: calcium titanate: 12049–50–2 CaWO 4: calcium tungstate: 7790–75–2 Ca 2 P 2 O 7: calcium ...
CaS: calcium sulfide hepar calcies sulfurated lime oldhamite: 20548-54-3 CaSO 3: calcium sulfite: 10257-55-3 CaSO 4: calcium sulfate: 7778-18-9 CaSO 4 · 0.5H 2 O: plaster of paris calcium sulfate hemihydrate: 10034-76-1 CaSe: calcium selenide: 1305-84-6 CaSeO 3: calcium selenite: 13780-18-2 CaSeO 4: calcium selenate: 14019-91-1 CaSiO 3 ...
Calcium sulfite, or calcium sulphite, is a chemical compound, the calcium salt of sulfite with the formula CaSO 3 ·x(H 2 O). Two crystalline forms are known, the hemihydrate and the tetrahydrate, respectively CaSO 3 ·½(H 2 O) and CaSO 3 ·4(H 2 O). [2] All forms are white solids. It is most notable as the product of flue-gas desulfurization.
Anhydrite, or anhydrous calcium sulfate, is a mineral with the chemical formula CaSO 4. It is in the orthorhombic crystal system, with three directions of perfect cleavage parallel to the three planes of symmetry. It is not isomorphous with the orthorhombic barium and strontium sulfates, as might be expected from the chemical formulas.
Calcium sulfide is the chemical compound with the formula Ca S. This white material crystallizes in cubes like rock salt. This white material crystallizes in cubes like rock salt. CaS has been studied as a component in a process that would recycle gypsum , a product of flue-gas desulfurization .
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO 4 ·2H 2 O. [4] It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, drywall and blackboard or sidewalk chalk.
The production of sulfuric acid from anhydrous calcium sulfate produces calcium silicates. [9] Upon being mixed with shale or marl, and roasted at 1400 °C, the sulfate liberates sulfur dioxide gas, a precursor to sulfuric acid. The resulting calcium silicate is used in cement clinker production. [10] 2 CaSO 4 + 2 SiO 2 + C → 2 CaSiO 3 + 2 SO ...